PHP Google OAuth Login

PHP Google OAuth API allows users to login in a website with their Google credentials. A user with a Google account need not remember yet another username/password for a web application. This PHP tutorial is to learn about setting up an authentication system for your custom web application using Google OAuth.

In the above code replace your own OAuth credentials and send it to Google OAuth Service class. Using this class instance we can access user data if the client access token is found. Otherwise, the login button will be shown which redirects to Google OAuth URL. The login view page code is,